Answer:
Multiplying and simplifying the term
we get

Option C is correct option.
Explanation:
We need to multiply and simplify:

Simplifying the term:

While multiplying, the variables with same bases are multiplied:

In the given question only x^2 and x^4 are variables with same bases, So we get:

So, multiplying and simplifying the term
we get

Option C is correct option.